Improvement in stove-pipe thimbles



UNITED STATES GEoRGE w. RoGERs, O LAKE CITY, MINNESOTA.-

' IMPROVEMENT IN STOVE-PIPE THIMBLES'.

Specification forming part of Letters Patent No. 179,729, dated July 11,1876; application filed November 18, 1875.

To all whom it may concern:

Be it known that I, GEORGE W. RoGERs, of Lake City, in the county ofWabash-a and State of Minnesota,have invented a new and usefulImprovement in Stove-Pipe Thimbles and I do hereby declare the followingto be a full, clear, and exact description thereof, which will enableothers skilled in the art to which it appert-ains to make and use thesame,

reference being had to the accompanying drawing, forming part of thisspecification,

My invention relates to that class of stovepipe thimbles used inchimneys; and its object is to provide a means of ventilating the roomthrough the chimney when desired.

To that end it consists in providing the outer face of the thimble'witha series of openings, communicating with the cavity of the chimneythrough the chamber between the outer and inner casing of the thimble,in combination with a revolving disk arranged within said chamber, andprovided with like openings, corresponding with the openings through theface of the thimble, whereby the latter are opened or closed by arotation of the disk, as will be more fully understood by the followingdescription and claim.

In the drawing, A represents the annular plate forming the outer face ofthe thimble. This plate is provided with a series of openings, a,arranged at graduated distances, one from the other, as shown in Fig. l,and at its center with an opening, through which the stove-pipe passes.One of the faces of this plate, which is designated as the back, isprovided with annular ribs or flanges d d, projecting outward from thesame.

B is the outer shell of the thimble, and B the inner shell, both ofwhich are permanently riveted to the respective flanges d d, forming anannular chamber, 0,0011]- municating with the cavity of the chimney. Theend of shell B adjacent to the plate is provided with a flange, e,projecting at a right angle from the periphery of the shell,

as shown in Fig. 2, and the shell is so attached to flange d as to forma groove extending around the said flange, between flange e and the backof the plate.

D is an annular disk, which is loosely fitted within chamber 0, betweenflange e of the inner shell and the back of the plate A, as shown" inFig. 2. This disk is provided with a series of openings, 0.,corresponding with openings at of the plate, and is so arranged as toadmit of a slight rotary motion, by which means the openings at in theplate are opened or closed at will.

F is an annular rim, which is permanently riveted to the inner side ofshell B, at its end opposite to plate A, the object of which is toprevent the inner end of the shell from being bent out of shape. Thisrim is provided with a series of arms, f, extending inward slightly pastthe inner shell B, toward the center of the same. Permanently attachedto the inner end of these arms is a second rim, F, the gross diameter ofwhich is slightly less than the diameter of the opening through theinner shell, as shown in Fig. 1. This rim is so arranged as to pass intothe inner end E of the stove-pipe, by which means the latter is securedcentrally within the inner shell, forming an air space between thelatter and the outer surface of the pipe.

The outer face of disk D is provided with lugs G G, arranged on oppositesides of the same. These lugs pass through mortises h h, formed throughplate A, as shown in Fig. 1. Permanently attached to the outer end ofthese lugs is a chain, H, by means of which a slight rotary movement isimparted to the disk, by pulling downward on the chain to open or closeopenings at in the plate.

Pivoted to the rear of two of the arms f are buttons g g, adapted tobear against the inner surface of the chimney, by which means thethimble proper is secured in position within the opening of the chimney.

The operation of my invention is.such that by turning the disk, so as toallow a circulation of air through the openings into the chimney, theroom may be ventilated at will, 6, in combination with shells B B andrims and at the same time reduce the draft of the F F, all constructedand arranged as destove. scribed.

Having thus described my invention, I GEORGE Vv ROGERS claim- In astove-pipe thimble, the plate A, pro- Witnesses: v vided with opening a,disk D, having the JULIUS WELGKER, opening a, and secured to the plateby flange N. H. SHERBURNE.

